Grinding mill



May 12, 1925. 1,537,759

J. M. FLEMING ET AL GRINDING MILL Filed June 25, 1923 4 sheets shet 1 Fig.1.

May 12, 1925. 1,537,759

. J. M. FLEMING ET AL GRINDING MILL Filed June 25-, 1923 A'Sh etS She'et 2 Fig.2.

INVENTOR.

May 12, 1925. 7 1,537,759

J. M. FLEMING ET AL GRINDING MILL Filed June 25, 1923 4 Sheets-Sheet 5 m ii I; En E INVENTOR. @mflm 7 ";5*'

PATENT OF/FICE. I

JOSEPH M. FLEMING AN'D WILLIAM BARNES; F MANCHESTER, GLAND.

GRINDING MILL.

, Application filed June as, 1923. Serial No. 647,742.-

To all whom ma concern:

- enamels,

1 descriptions.

Be it known t at we, Josnrn MAsoN FLEMING and WILLIAM HENRY BARNES, both British subjects, residing at Manchester, county of Lancaster, England, have 1nvented certain new and useful Improvements in Grindin Mills, of which the following is a speci cation. 1

This .invention relates to grinding, mixing or incorporating mills applicable. for

treating substances in a liquid, semi-liquid or granular state, such as paints, colours, varnishes, compositions,- dyes, chemicals, printing inks, pottery sllp, chocolate,. emulsions and other pastes, liquids, semi liquids and powder. of various The-apparatus comprises an enclosed stationary chamber or container in which vertical or inclined grinding discs are placed, a stationary disc or discs with a central or eye feed affixed to the casing and a rotary disc mounted on a horizontal shaft operating against the face of the stationary disc or betweenv two stationary discs, a feed hopper or pipe being fitted tothe casing on the outside through which the material is fed to the centre of the disc.

The invention will be fully described with reference to the accompanying drawings.

Fig. 1 is a side elevation.

Fig. 2 is'a plan. Fig. 3 is a longitudinal'section.

'Fig. dis a front elevation of the driving plate F and grinding ring.

Fig. 5 is a sectional elevation of same on line 5-5.

Fig. 6 is a section of grinding ring on line 66.

the casing from which the material to be ground is fed casing.

A rotary grindin disc or ring D 1s mounted in the cham er A in close proximthrough an opening 0 in the ity to the fixed disc or ring B. It is bolted to a driving plate F on the end of a horizontal shaft G which projects through a suitable gland or stuffing box into the chamber A. c

The grinding chamber A is provided with rotation of the grin a discharge aperture or valve a at any distance above the bottom preferably about on a level with the feed inlet a and with a sec-- ond discharge aperture and valve a'in the bottom through either of which the ground material may be discharged at a continuous and constant-speed according to the length of time it is desired to maintain it in the apparatus.

To the discharge a ertures a a a- ,pipe (not shown) may be tted to maintain the material at any desired level within the grinding chamber. And to the top'of the chamber may be fitted a pressure relief column or pipe of such a length that .whilst providing relief from internal pressure,

/ hopper the pipe H is turned to one side of the hopper, the discharge from the chamber A may be ,eifected through it.

Byany of these arrangements of disstopped at will, irrespective of the de cc of pressure applied to the grinding discs, and without stopping the machine. A liquid seal may also be fitted at the base of the feed hopper or inlet to minimize the ad mission of air into the casing or grinding chamber and consequent aeration of the product.

The grinding discs or rings B and D are grinding made with two or more distinct areas (11 d on the same surface of each disc or rings of grinding surface divided by a plain or uncut ring I) anda plain or uncut ring 1) around the (peripheral edgel The ing disc D maintains the material in constant agitation in the chamber A thereby preventing the heavier material from settling at the bottom.

By the retention of material in the cham her A during the process of grinding the escaping fumes or gasesrnay be condensed charge pipes and valves the flow of ground material can be regulated to any speed or heat generated dneto the friction of grinding between the rings or discs B and'D Wlll be uniformly dissipated into the compara-' tively large quantity of material contained in the casing, minimizing the risk of overheating any portions of the charge, reducing loss by evaporation, and permitting the use of relativelyhigh speeds in grinding. If desired the chamber A may be water jacketed to keep it cool.

The horizontal driving shaft G is mounted insuitable bearings g and fitted with driving pulleys g.

The pressure of the rotary grinding disc D against the disc B .is regulated and adjusted by a worm K enga ing a worm wheel -M at the end of'the driving shaft G. The

' boss m of the worm wheel M is provided with a -fine pitch screw which is screwed into a fixed bearing N and the end of the shaft G or a shoulder upon the shaft bears against a ball thrust bearing on the face of the worm wheel M. The teeth of the worm wheel are sufiiciently wide and of such a shape as to allow a to and fro movement of the wheel past the worm without throwing the worm out of gear. The axle of the worm K is mounted in fixed bearings.

By this construction adjustment of the grinding discs in very fine stages is obtained which will not slack back during prolonged runningi What we claim as our invention and desire to protect by Letters Patent is:

1. A grinding, mixing or incorporating apparatus comprising in its construction an enclosed stationary grinding chamber adapted to contain a fluid mixture, a fixed vertical grinding ring fitted therein with central feed aperture, a feed device fitted thereto feeding into the aperture in the fixed grinding ring,

a vertical rotary grinding disc mounted within the rinding chamber, a horizontal driving sha t to which the rotary grinding disc is affixed, a frame and anti-friction hearings to support the driving shaft and grinding disc, driving pulleys on the shaft, a thrust collar on the drlving shaft, in

screwed boss carried in a screwed bracket abutting against the thrust collar of the shaft and a worm wheel on the boss and a worm to rotate it to apply the desired pressureto the grinding discs.

-2. Grinding, mixing or incorporating apparatus comprising in its construction an enclosed stationary grinding chamber adapt ed to contain a fluid mixture having discharge apertures a a, a fixed vertical grinding ring fitted therein with central feed aperture, a feed device fitted thereto feeding into the aperture in the fixed grinding ring, a vertical rotary grinding disc mounted within the grinding chamber, a horiwitnesses.

J. M. FLEMING. WM. H. BARNES. Witnesses:

J. OWDEN OBnmN, BRIAN OBRIEN. 

